Pinning and Dynamics of Magnetic Flux Moving Across the Twin Planes in YBa2Cu3O6.97 Single Crystal
Abstract
We present the transport studies of field variation of the pinning force for the flux motion across the twin boundaries in YBaCuO single crystals. It is found that the depinning current Jc decreases with an increase in the magnetic field due to reduction of the portion of vortex lines trapped by the TB's. However, at transport currents J << Jc, the vortex velocity weakly decreases with the increased field, i.e. it is determined mainly by the release of the vortex lines from the TB's.
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